Settlement Deformation Law Of Roadbed In Longhuai Highway

Due to the construction of expressway span in China,different geological conditions vary widely,and many factors affect foundation settlement,it is difficult to get a suitable for all regional settlement calculation Method,and its accuracy is difficult to be controlled,the control of high-speed roadbed settlement control effect is poor,the engineering sector,can only be put forward a limited in the region of the highway subgrade settlement calculation method.Therefore,Based on the investigation and analysis of the roadbed of Longhuai expressway,the settlement prediction method is studied and the dynamic monitoring of roadbed subsidence of typical sections is carried out.According to the geological conditions of the site,The soil subgrade is sampled at intervals of 20 m and a variety of indoor soil tests are carried out in order to obtain the actual soil layer distribution and soil parameters in the field.The full understanding of field practice provides the basis for calculation of the following numerical simulation,Engineering provides the data foundation.At last,the finite element analysis software MIDAS / GTS is used to simulate the two-dimensional roadbed deformation.The numerical simulation of two CFG piles with or without CFG piles is analyzed and compared,and the corresponding finite element model is established.The simulated settlement difference is about 3.8mm,and the measured settlement difference is about 3.1mm.The simulated settlement difference curve is in agreement with the actual measured settlement difference Which shows that the numerical simulation results are feasible and can analyze the actual working conditions to a certain extent.